Greatest of all Time?

With Dirks' recent dominance in these playoffs and most notably in the 4th quarter averaging over 10 point in the most important quarter. How can we compare the greatest of today to the great of the past. Bob Cousy, often referred by old timers as a top 25 player in NBA history is 6'1 175 with very limited athletic ability. His career averages are 18.4 pts, 7.5 assists and shooting an abysmal 37.5%. and 80% from the charity stripe, he is an all time great? Steve Nash, a player not considered in the class of cousy, has career averages of 14.6 ppg, 8.5 assists, 43% 3-pt, 90.4% from the line and 50% fg shooting. Nash has done this against the top athletes in the world 6-4 to 6-8 super athletic muscle bound with 40in verticals covering him You cannot put Bob Cousy in Steve Nash's' ballpark and it's not even that close. In 2011 90% of the NBA will school Cousy and he will have no better chance than me or you. It simply is not fair to compare the past greats to the current greats of all time. 40 years ago they did not lift weights, know about protein and carb % intakes and due to black athletes having to overcome much more to make it pro the competition was inferior. If Bill Russell played in today's game against a Shaq in his prime, due to Shaq's size and dominace, I would give Shaq a huge advantage. We can not look at weight lifting and nutrition as a rule of thumb that will improve Russells' physcial staturebecause it cannot be foreseen if he would take advantage or not. You have to judge the greats in the NBA against their competition at the time they played. Jerry West the NBA logo, went to the finals 9 times and won once. One? 1-8 in the finals we would crucify him in these modern days. Cousy dominated his time more than Nash, Nash would destroy Cousy in a game of one on onevb, but in their generation Cousy was more dominate than Nash and that is all that we can go by. Bill Russell was 6'9 235 and would of covered Dirk, Dirk would have posterized Russell every single time and it's not even close.
My top ten (according to their time)

#1 Jordan ( he would be the best player in 2011 hands down)
#2 Magic Johnson (6'9 Point Guard best PG ever)
#3 Kareen Abdoul Jabbar
#4 Larry Bird
#5 Bill Russell ( 10 Championships)
#6 Wilt
#7 Kobe
#8 Hakeem
#9 Shaq
#10 Tim Duncan

Dirk, Lebron and Wade are all players to keep an eye on depending on what happens in the finals. If Dirk carries this Mavs team to a Championship with no Robin to his Batman. He will jump up the list and without question go down as better than Malone and Barkley as the better power forward. Even if he does not win this ring, I believe he has jumped Malone and Barkley as the second best power forward ever behind Duncan and should be considered a top 20 player of all time.